The number 38909
38909 is a composite number with 8 divisors. Its prime factorisation is 13 × 41 × 73. Divisors (8): 1, 13, 41, 73, 533, 949, 2993, 38909.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
38909 has no famous special property in the usual lists (prime, square, cube, triangular, Fibonacci, palindrome, perfect), but it is still a composite number.
- 2
38909 is composite. Its prime factorisation is
- 3
The divisors add up to 43512; without 38909 itself that is 4603, so 38909 is deficient (4603 is less than 38909). Euler's totient φ(38909) = 34560 numbers up to 38909 share no factor with it.
- 4
The digits of 38909 add up to 29, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 93 steps to reach 1.
LaTeX source of the formulas on this page
\[ 38909 = 13 \times 41 \times 73 \]
38909 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 8 |
| Sum of divisors | 43512 |
| Euler totient φ(n) | 34560 |
| Square | 1513910281 |
| Cube | 58904735123429 |
| Square root | 197.253644 |
| Digit sum / digital root | 29 / 2 |
| Collatz steps to 1 | 93 |
| Scientific notation | 3.8909 × |
38909 in other forms
| Form | Value |
|---|---|
| In words | thirty-eight thousand nine hundred and nine |
| Binary (base 2) | 1001011111111101 |
| Octal (base 8) | 113775 |
| Hexadecimal (base 16) | 97FD |
| Base 3 | 1222101002 |
| As time | 38909 seconds = 10 h 48 min 29 s |
Is 38909 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 4) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | No (remainder 3) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 5) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 9) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 2) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 38909 a prime number?
No. 38909 = 13 × 41 × 73, so it is divisible by 13.
What are the factors of 38909?
1, 13, 41, 73, 533, 949, 2993, 38909.
What is 38909 in binary?
1001011111111101 (hexadecimal 97FD, octal 113775).
What is the square root of 38909?
About 197.2536.
Is 38909 divisible by 3?
No. Its digits add up to 29, which is not a multiple of 3.
What is special about the number 38909?
It is a composite number with 8 divisors.